Browsing Center for Organic Photonics and Electronics (COPE) by Title
Now showing items 379-397 of 397
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Ultra-high Q planar silicon microdisk resonators for chip-scale silicon photonics
(Georgia Institute of TechnologyOptical Society of America, 2007-04)We report the fabrication and experimental characterization of an ultra-high Q microdisk resonator in a silicon-on-insulator (SOI) platform. We examine the role of the substrate in the performance of such microdisk resonators. ... -
Ultrafast optical image processing based on third-harmonic generation in organic thin films
(Georgia Institute of TechnologyAmerican Institute of Physics, 2007-09-24)We report on the use of the noncollinear third-harmonic generation in an amorphous polymer film operating in the eye safe and telecommunication compatible near-infrared range to perform ultrafast all-optical two-dimensional ... -
Ultrafast-pulse diagnostic using third-order frequency-resolved optical gating in organic films
(Georgia Institute of TechnologyAmerican Institute of Physics, 2004-10)We report on the diagnostic of ultrafast pulses by frequency-resolved optical gating (FROG) based on strong third-harmonic generation (THG) in amorphous organic thin films. The high THG conversion efficiency of these films ... -
Understanding the effects of photoacid distribution homogeneity and diffusivity on critical dimension control and line edge roughness in chemically amplified resists
(Georgia Institute of TechnologyAmerican Vacuum Society, 2008-11)Resist critical dimension (CD) control and line edge roughness (LER) reduction has been one of the most challenging issues for sub-100 nm feature patterning in integrated circuit manufacturing. Among those factors ... -
Understanding the relationship between true and measured resist feature critical dimension and line edge roughness using a detailed scanning electron microscopy simulator
(Georgia Institute of TechnologyAmerican Vacuum Society, 2010-11)Top-down critical dimension scanning electron microscopy (SEM) is still the workhorse metrology tool used for nanoscale structure analysis, such as measurement of photoresist features, during integrated circuit manufacturing. ... -
Universal sequence replication, reversible polymerization and early functional biopolymers: a model for the initiation of prebiotic sequence evolution
(Georgia Institute of TechnologyPublic Library of Science, 2012-04)Many models for the origin of life have focused on understanding how evolution can drive the refinement of a preexisting enzyme, such as the evolution of efficient replicase activity. Here we present a model for what was, ... -
Using interdigitated electrodes for measuring photoacid generator kinetics in chemically amplified resists
(Georgia Institute of TechnologyElectrochemical Society, 2004-02)In this work, the feasibility of using interdigitated electrodes to measure the kinetics of photoacid generation in a resist film has been examined. Interdigitated electrodes provide a quick, noninvasive, nondestructive ... -
Vapor phase detection of a narcotic using surface acoustic wave immunoassay sensors
(Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2005-06)Currently, the narcotic sniffing dog remains the most accurate, reliable, and widely used sensing technology in the war on drugs. However, recent studies done at the Institute for Biological Detection Systems at Auburn ... -
Variable splitting ratio 2 × 2 MMI couplers using multimode waveguide holograms
(Georgia Institute of TechnologyOptical Society of America, 2007-07)Variable power splitting ratio 2×2 MMI couplers using multi-mode waveguide holograms are analyzed. Theoretical analysis shows that variable splitting ratios can be obtained with surface relief holograms on MMI couplers ... -
Variable-ratio power splitters using computer-generated planar holograms on multimode interference couplers
(Georgia Institute of TechnologyOptical Society of America, 2009-02)Variable-ratio power splitters using computer-generated planar holograms on multimode interference couplers are analyzed. The coherent wave at the device input is transformed to the desired output using numerically calculated ... -
Very-high-resolution tandem Fabry-Perot etalon cylindrical beam volume hologram spectrometer for diffuse source spectroscopy
(Georgia Institute of TechnologyOptical Society of America, 2008-01)We demonstrate a compact and slitless spectrometer with high resolution formed by cascading a Fabry-Perot etalon (FPE) and a cylindrical beam volume hologram (CBVH). The most significant advantage of this combined spectrometer ... -
Video-rate compatible photorefractive polymers with stable dynamic properties under continuous operation
(Georgia Institute of TechnologyAmerican Institute of Physics, 2004-09)We report on photorefractive polymer composites that exhibit stable dynamic properties under continuous operation. These materials are based on a bis-triarylamine side-chain polymer matrix with a low ionization potential. ... -
Volumetric storage limits and space-volume multiplexing trade-offs for holographic channels
(Georgia Institute of TechnologySociety of Photo-optical Instrumentation Engineers (SPIE), 2010-01)We consider M-ary signaling in page-oriented holographic storage systems that multiplex pages using three methods: conventional angular multiplexing throughout the volume, localized recording, and a combination of angular ... -
Wavelength response of waveguide volume grating couplers for optical interconnects
(Georgia Institute of TechnologyOptical Society of America, 2004-09)The wavelength response of a waveguide volume grating coupler (WVGC) is analyzed for coupling light from a slab waveguide into the superstrate. A leaky-mode approach is used in conjunction with rigorous coupled-wave analysis. ... -
White OLEDs for Displays and General Lighting
(2014-06-06)Junji Kido presents a talk on the recent progress in white OLEDs. In 1993, white-light-emitting OLEDs were developed for the first time. Since then, the performance of white OLEDs has steadily improved and, today, they ... -
Wideband measurements of angle and delay dispersion for outdoor and indoor peer-to-peer radio channels at 1920 MHz
(Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2003-05)This paper presents spatio-temporal measurements for the peer-to-peer radio channel at a center frequency of 1920 MHz with 140 MHz of radio-frequency bandwidth. The measurements were taken using a spread-spectrum channel ... -
Wiener chaos expansion and simulation of electromagnetic wave propagation excited by a spatially incoherent source
(Georgia Institute of TechnologySociety for Industrial and Applied Mathematics -, 2010)First, we propose a new stochastic model for a spatially incoherent source in optical phenomena. The model naturally incorporates the incoherent property into the electromagnetic wave equation through a random source term. ... -
The X-1 Sigma(+)(g), B-1 Delta(g), and B ` (1)Sigma(+)(g) states of C-2: A comparison of renormalized coupled-cluster and multireference methods with full configuration interaction benchmarks
(Georgia Institute of TechnologyAmerican Institute of Physics, 2005-03)Unusual bonding and electronic near degeneracies make the lowest-lying singlet states of the C2 molecule particularly challenging for electronic structure theory. Here we compare two alternative approaches to modeling ... -
Young modulus dependence of nanoscopic friction coefficient in hard coatings
(Georgia Institute of TechnologyAmerican Institute of Physics, 2003-08)We present an atomic force microscope study of nanoscopic sliding friction on diamond, diamond-like carbon, and on three CrN thin films with varying hardness obtained by different growth temperatures. For the CrN films, ...